Yes i'm new here and don't know a massive amount about saltwater aquariums but my school has been keeping one but it was in such bad shape that everything died except one unknown damsel and three very small anenomes. When me and a freind of mine came in we got haylide bulbs and flourescent bulbs and a few new fish. anyways we are left with a little gift from the previous era which I am sure you all know very well I am speaking of course of cyanobacteria :x well we have been using chemicals to keep it under control but I of course want to get rid of it. I have come across a few things that people have said will help but I would rather talk on a little bit of a more personal level. So far the reccomendations I have gotten include Scarlet reef and Electric Blue Hermit crabs as well as a queen conch. THe conch interests me the most as they grow rather large and do a good job of eating cyanobacteria. The main thing I ama fraid of with them is if they will eat our purple coral which has just started emerging on our rocks. Will they also leave my anenomes alone? I'll just give a list of whats in the tank. The tank is 250 gallons with 1 flame hawkfish, 1 flam angelfish, 1 unknown Damsel and 4 anenomes (one of them split) as well as many unkown snails that I do not know the species of. i have seen a few very very small hermit crabs. one with black and white striped legs and two with red legs. I am afraid I do not know their species either. Well any help would be appreciated. Feel free to elaborate on any other fish you would reccomend as well that would be compatable with what I have. Oh and would cleaner shrimp be compatable int he tank?